2 * Copyright (c) 2013 Qualcomm Atheros, Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 static void ath9k_tx99_stop(struct ath_softc *sc)
21 struct ath_hw *ah = sc->sc_ah;
22 struct ath_common *common = ath9k_hw_common(ah);
24 ath_drain_all_txq(sc);
27 ath9k_hw_set_interrupts(ah);
28 ath9k_hw_enable_interrupts(ah);
30 ieee80211_wake_queues(sc->hw);
32 kfree_skb(sc->tx99_skb);
34 sc->tx99_state = false;
36 ath9k_hw_tx99_stop(sc->sc_ah);
37 ath_dbg(common, XMIT, "TX99 stopped\n");
40 static struct sk_buff *ath9k_build_tx99_skb(struct ath_softc *sc)
42 static u8 PN9Data[] = {0xff, 0x87, 0xb8, 0x59, 0xb7, 0xa1, 0xcc, 0x24,
43 0x57, 0x5e, 0x4b, 0x9c, 0x0e, 0xe9, 0xea, 0x50,
44 0x2a, 0xbe, 0xb4, 0x1b, 0xb6, 0xb0, 0x5d, 0xf1,
45 0xe6, 0x9a, 0xe3, 0x45, 0xfd, 0x2c, 0x53, 0x18,
46 0x0c, 0xca, 0xc9, 0xfb, 0x49, 0x37, 0xe5, 0xa8,
47 0x51, 0x3b, 0x2f, 0x61, 0xaa, 0x72, 0x18, 0x84,
48 0x02, 0x23, 0x23, 0xab, 0x63, 0x89, 0x51, 0xb3,
49 0xe7, 0x8b, 0x72, 0x90, 0x4c, 0xe8, 0xfb, 0xc0};
51 struct ieee80211_tx_rate *rate;
52 struct ieee80211_hw *hw = sc->hw;
53 struct ath_hw *ah = sc->sc_ah;
54 struct ieee80211_hdr *hdr;
55 struct ieee80211_tx_info *tx_info;
58 skb = alloc_skb(len, GFP_KERNEL);
64 memset(skb->data, 0, len);
66 hdr = (struct ieee80211_hdr *)skb->data;
67 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA);
70 memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
71 memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
72 memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
74 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
76 tx_info = IEEE80211_SKB_CB(skb);
77 memset(tx_info, 0, sizeof(*tx_info));
78 rate = &tx_info->control.rates[0];
79 tx_info->band = hw->conf.chandef.chan->band;
80 tx_info->flags = IEEE80211_TX_CTL_NO_ACK;
81 tx_info->control.vif = sc->tx99_vif;
83 if (ah->curchan && IS_CHAN_HT(ah->curchan)) {
84 rate->flags |= IEEE80211_TX_RC_MCS;
85 if (IS_CHAN_HT40(ah->curchan))
86 rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
89 memcpy(skb->data + sizeof(*hdr), PN9Data, sizeof(PN9Data));
94 static void ath9k_tx99_deinit(struct ath_softc *sc)
100 ath9k_ps_restore(sc);
103 static int ath9k_tx99_init(struct ath_softc *sc)
105 struct ieee80211_hw *hw = sc->hw;
106 struct ath_hw *ah = sc->sc_ah;
107 struct ath_common *common = ath9k_hw_common(ah);
108 struct ath_tx_control txctl;
111 if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
113 "driver is in invalid state unable to use TX99");
117 sc->tx99_skb = ath9k_build_tx99_skb(sc);
121 memset(&txctl, 0, sizeof(txctl));
122 txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO];
128 ath9k_hw_disable_interrupts(ah);
129 atomic_set(&ah->intr_ref_cnt, -1);
130 ath_drain_all_txq(sc);
133 sc->tx99_state = true;
135 ieee80211_stop_queues(hw);
137 if (sc->tx99_power == MAX_RATE_POWER + 1)
138 sc->tx99_power = MAX_RATE_POWER;
140 ath9k_hw_tx99_set_txpower(ah, sc->tx99_power);
141 r = ath9k_tx99_send(sc, sc->tx99_skb, &txctl);
143 ath_dbg(common, XMIT, "Failed to xmit TX99 skb\n");
147 ath_dbg(common, XMIT, "TX99 xmit started using %d ( %ddBm)\n",
151 /* We leave the harware awake as it will be chugging on */
156 static ssize_t read_file_tx99(struct file *file, char __user *user_buf,
157 size_t count, loff_t *ppos)
159 struct ath_softc *sc = file->private_data;
163 len = sprintf(buf, "%d\n", sc->tx99_state);
164 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
167 static ssize_t write_file_tx99(struct file *file, const char __user *user_buf,
168 size_t count, loff_t *ppos)
170 struct ath_softc *sc = file->private_data;
171 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
180 len = min(count, sizeof(buf) - 1);
181 if (copy_from_user(buf, user_buf, len))
184 if (strtobool(buf, &start))
187 if (start == sc->tx99_state) {
190 ath_dbg(common, XMIT, "Resetting TX99\n");
191 ath9k_tx99_deinit(sc);
195 ath9k_tx99_deinit(sc);
199 r = ath9k_tx99_init(sc);
206 static const struct file_operations fops_tx99 = {
207 .read = read_file_tx99,
208 .write = write_file_tx99,
210 .owner = THIS_MODULE,
211 .llseek = default_llseek,
214 static ssize_t read_file_tx99_power(struct file *file,
215 char __user *user_buf,
216 size_t count, loff_t *ppos)
218 struct ath_softc *sc = file->private_data;
222 len = sprintf(buf, "%d (%d dBm)\n",
226 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
229 static ssize_t write_file_tx99_power(struct file *file,
230 const char __user *user_buf,
231 size_t count, loff_t *ppos)
233 struct ath_softc *sc = file->private_data;
237 r = kstrtou8_from_user(user_buf, count, 0, &tx_power);
241 if (tx_power > MAX_RATE_POWER)
244 sc->tx99_power = tx_power;
247 ath9k_hw_tx99_set_txpower(sc->sc_ah, sc->tx99_power);
248 ath9k_ps_restore(sc);
253 static const struct file_operations fops_tx99_power = {
254 .read = read_file_tx99_power,
255 .write = write_file_tx99_power,
257 .owner = THIS_MODULE,
258 .llseek = default_llseek,
261 void ath9k_tx99_init_debug(struct ath_softc *sc)
263 if (!AR_SREV_9300_20_OR_LATER(sc->sc_ah))
266 debugfs_create_file("tx99", S_IRUSR | S_IWUSR,
267 sc->debug.debugfs_phy, sc,
269 debugfs_create_file("tx99_power", S_IRUSR | S_IWUSR,
270 sc->debug.debugfs_phy, sc,